Influence of Stiffness of the Arm Rubber Joint on Vehicle Dynamic Performance for High-Speed Train

Hou, Maorui; Liu, Chong; Hu, Xiaoyi; Guo, Tong

doi:10.1061/9780784483886.047

Cited by 3 publications

(3 citation statements)

References 3 publications

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“…19 But for the service rubber joints, the stiffness decreases by nearly 40%; while the maximum stiffness increases by approximately 30%. 20 Therefore, stiffness varies from À40% to 30% for primary joints and yaw damper joints in this paper.…”

Section: Various Parametersmentioning

confidence: 99%

Investigating the effect of rail profile deviation on hunting instability of high-speed railway vehicle under multi-parameter coupling

Hou

Yang

Chen

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part F:

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Small changes to wheel-rail profiles can have a significant impact on the equivalent conicity and vehicle dynamics. Previous research has focused mostly on worn wheels, however, with little attention to different types of rail profile deviation and their influences on vehicle dynamics. Therefore, the specific objective of this paper is to investigate the individual and combined influences of various rail profiles and multi-parameter couplings on the hunting instability of railway vehicles. This paper first obtains the distribution law of rail profile deviation from a statistical analysis of several rail profiles with long-term measurements. Then, the equivalent conicity of rail profiles that match the studied wheel profiles, gauges and wheelback distances is compared. The dynamic model for the vehicle has been established. Finally, the measured rail profiles and wheel profiles, as well as the combinations of the gauges, wheelback distances, friction coefficients and key suspension characteristics are integrated into the simulation model to analyze the atypical phenomenon of the carbody hunting and the bogie hunting. According to the findings, rail profile deviation has a significant impact on equivalent conicity and the evaluation of vehicle stability when subjected to multi-parameter coupling, particularly for worn wheels. Therefore, strict limits of rail profile deviation have to be considered in track maintenance for vehicles running at speeds of 300 km/h or higher.

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Section: Various Parametersmentioning

confidence: 99%

Investigating the effect of rail profile deviation on hunting instability of high-speed railway vehicle under multi-parameter coupling

Hou

Yang

Chen

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part F:

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“…Many scholars studied the impact of dynamics parameters of suspension component, wheel and rail profiles on the dynamics of high-speed EMU by choosing one parameter or several combinations of those parameters (Bai, Zeng, Shi, & Wu, 2020;M ad alina & Dragos, 2020;Hou, Hu, Zong, Guo, Luo, & Fan, 2021). These studies had yielded many meaningful results, but they only consider simple combinations of maximum and minimum values for a small number of parameters, without considering these parameters as random variables then systematically studying the distribution range and form of vehicle dynamics index when those parameters undergo random changes simultaneously.…”

Section: Introductionmentioning

confidence: 99%

Research on the evolution law of dynamic performance of CR400BF EMU train based on stochastic dynamics simulation

Cheng,

Wen,

Guo

et al. 2024

Self Cite

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PurposeThis paper aims to obtain the evolution law of dynamic performance of CR400BF electric multiple unit (EMU).Design/methodology/approachUsing the dynamic simulation based on field test, stiffness of rotary arm nodes and damping coefficient of anti-hunting dampers were tested. Stiffness, damping coefficient, friction coefficient, track gauge were taken as random variables, the stochastic dynamics simulation method was constructed and applied to research the evolution law with running mileage of dynamic index of CR400BF EMU.FindingsThe results showed that stiffness and damping coefficient subjected to normal distribution, the mean and variance were computed and the evolution law of stiffness and damping coefficient with running mileage was obtained.Originality/valueFirstly, based on the field test we found that stiffness of rotary arm nodes and damping coefficient of anti-hunting dampers subjected to normal distribution, and the evolution law of stiffness and damping coefficient with running mileage was proposed. Secondly stiffness, damping coefficient, friction coefficient, track gauge were taken as random variables, the stochastic dynamics simulation method was constructed and applied to the research to the evolution law with running mileage of dynamic index of CR400BF EMU.

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“…In order to increase the vehicle hunting stability, the stiffness and damping parameters of bogie suspensions need to be carefully designed [2][3][4]. However, when the wheel abnormal wear or the suspension parameter degeneration take place in vehicle long-term service, the vehicle hunting instability may occur, especially in high speed operation, which will bring significant influence on the vehicle running performance [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Wayside wheelset lateral motion detection and vehicle hunting instability evaluation

Peng,

Zeng,

Wang

et al. 2023

Meas. Sci. Technol.

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Wheel profile wear, or bogie suspension failure will result in hunting instability of the vehicle system which will lead to dramatic changes in the lateral motion of the wheelset. The occurrence of hunting instability will worsen the ride performance of the vehicle or even cause the danger of wheelset derailment. Thus, the in-time and effective detection of wheelset lateral motion is very important for the evaluation of vehicle hunting stability. By installing a certain amount of displacement sensors on the rail side along the track and detecting the distance between the wheel and rail when the wheel passing by, the lateral displacements of the wheelset in measuring points can be obtained. The detection method of wheelset lateral motion by the wayside is studied, which includes the measuring principle, structure design, sensor installation, data acquisition and data analysis, and the application of the method to on-site detection for typical instability cases are demonstrated. At the same time, innovate on the existing on-board hunting instability monitoring method, proposed an evaluation method of hunting instability for wayside lateral movement monitoring system. The results show that: installing 20 eddy current sensors on both sides of the straight track to measure the lateral displacement of the wheelset can meet the requirement of detecting the vehicle hunting instability. The wheelset lateral displacement can be used to monitor the occurrence of vehicle hunting instability if periodic motion is detected. The amplitude of the motion can determine the hunting instability level, and the frequency can be used to describe the wheel wear level and calculate the wheel/rail contact equivalent conicity. This method is able to provide a reliable data support for the vehicle operation safety. The proposed monitoring method and monitoring index are also of reference value to the development of other wayside hunting instability monitoring systems.

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Influence of Stiffness of the Arm Rubber Joint on Vehicle Dynamic Performance for High-Speed Train

Cited by 3 publications

References 3 publications

Investigating the effect of rail profile deviation on hunting instability of high-speed railway vehicle under multi-parameter coupling

Investigating the effect of rail profile deviation on hunting instability of high-speed railway vehicle under multi-parameter coupling

Research on the evolution law of dynamic performance of CR400BF EMU train based on stochastic dynamics simulation

Wayside wheelset lateral motion detection and vehicle hunting instability evaluation

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